The instrumental case helps us show that one person is doing something with another person. Here are four simple examples of when we use it:

1. When Talking About Going Somewhere:

   • Example: Я иду с другом.
     (I am going with a friend.)

2. When People Work Together:

   • Example: Он работает вместе с коллегами.
     (He works together with colleagues.)

3. When Mentioning Something Someone Has:

   • Example: Она пришла с книгой.
     (She came with a book.)

4. When Describing Feelings with Someone:

   • Example: Когда я с ним, я чувствую себя уверенно.
     (When I am with him, I feel confident.)

To get better at using the instrumental case, try making your own sentences for these situations!